There was this one time I shielded my jungler as a Geb but the shield was immediately destroyed by Agni bombs and he eventually died a few seconds later to additional damage a little later and blamed me for not shielding him

I can't say much about arachne since I don't/can't play her but Hades buff did help.

It may not seem like it at first IF you're playing Hades incorrectly. Yeah, you'll still be blown to bits of you try to initiate with Hades but he is one of the best COUNTER initiators. And the buff to his ult made him that much better.

Don't get me wrong, there are plenty of things still wrong with him that needs fixing, mostly his animations that rival Xing memes. Other than that Hades can be super predictable which is why he can't really be utilized at higher levels of play.

Besides Hel, Baron has arguably the best heal in the game in that it can also give you a sprint affect on top of an immediate percent missing heal. The only downside is that Baron has to hit an enemy god where Hel can just heal you straight up.